If "testimony" refers to evidence:
* Denial: This implies a direct contradiction of the testimony.
* Refutation: This implies proving the testimony false.
* Disproof: Similar to refutation, but emphasizing the logical process.
If "testimony" refers to a witness's statement:
* Silence: This implies a refusal to provide information.
* Concealment: This suggests actively hiding or withholding information.
* Suppression: This implies a deliberate act of preventing the testimony from being heard.
If "testimony" refers to a formal statement in court:
* Counterclaim: This implies presenting an opposing argument.
* Defense: This suggests a legal response to the accusations made in the testimony.
Other options:
* Contradiction: A general term for any statement that opposes the testimony.
* Discrepancy: This suggests an inconsistency between the testimony and other evidence.
* Falsification: This implies deliberately manipulating the truth.
The best antonym will depend on the specific context and the meaning you want to convey.